Compression no longer working for some jobs
We have a number of jobs that run over the week. For some reason about a month ago our "Full" backup jobs began using much less compression. It went from a ratio of 1.5:1 to 1:1 or maybe 1.1:1. Our "Incremental" jobs are still compressing at 1.4:1. Does anyone have any idea why this is happening?
Things of note:
1. The tape drive is an HP StorageWorks 1/8 G2 Autoloader
2. All tapes are new HP LTO-5 Ultrium (C7975A)
3. All jobs (Full & Incremental) are set to compression type of "Hardware [if available, otherwise none]"
4. The "Enable Compression" check box on the drive config. is checked.
Thank you in advance for any help you can provide.